Sample preparation for proteomic analysis using a GeLC-MS/MS strategy

Authors

  • Joao A. Paulo Harvard Medical School

DOI:

https://doi.org/10.14440/jbm.2016.106

Keywords:

biomarkers, GeLC-MS/MS, mass spectrometry, proteomics

Abstract

In-gel digestion coupled with mass spectrometric analysis (GeLC-MS/MS) is a cornerstone for protein identification and characterization. Here I review this versatile approach which combines classical and modern biochemistry strategies and allows for targeted and proteome-wide analyses. Starting with any protein sample, reduced and alkylated proteins are precipitated prior to fractionation by SDS-PAGE. Proteins are in-gel digested and the resulting peptides are extracted and desalted for downstream LC-MS/MS analysis. GeLC-MS/MS leverages the advantages of both traditional SDS-PAGE visualization and protein fractionation with the robust protein and post-translational modification identification and quantitation capabilities of state-of-the-art mass spectrometry-based technology. As such, this strategy allows for the visible assessment of protein amount and quality, prior to analysis via virtually any mass spectrometry platform. Moreover, gel extracted peptides may be derived from any sample type—e.g., from cell culture, tissue, body fluid, or recombinantly-expressed protein—and are fully compatible with isobaric tagging. GeLC-MS/MS is an invaluable technique for proteomic analyses.

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Published

2016-07-12

How to Cite

1.
Paulo JA. Sample preparation for proteomic analysis using a GeLC-MS/MS strategy. J Biol Methods [Internet]. 2016Jul.12 [cited 2021May8];3(3):e45. Available from: https://jbmethods.org/jbm/article/view/106

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